svn merge ^/branches/released . --username marha

1 files changed, 228 insertions, 0 deletions

diff --git a/mesalib/src/mesa/swrast/s_bitmap.c b/mesalib/src/mesa/swrast/s_bitmap.c
new file mode 100644
index 000000000..3dbdf2a61
--- /dev/null
+++ b/mesalib/src/mesa/swrast/s_bitmap.c
@@ -0,0 +1,228 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file swrast/s_bitmap.c
+ * \brief glBitmap rendering.
+ * \author Brian Paul
+ */
+
+#include "main/glheader.h"
+#include "main/bufferobj.h"
+#include "main/image.h"
+#include "main/macros.h"
+#include "main/pixel.h"
+
+#include "s_context.h"
+#include "s_span.h"
+
+
+
+/**
+ * Render a bitmap.
+ * Called via ctx->Driver.Bitmap()
+ * All parameter error checking will have been done before this is called.
+ */
+void
+_swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
+		GLsizei width, GLsizei height,
+		const struct gl_pixelstore_attrib *unpack,
+		const GLubyte *bitmap )
+{
+   GLint row, col;
+   GLuint count = 0;
+   SWspan span;
+
+   ASSERT(ctx->RenderMode == GL_RENDER);
+
+   bitmap = (const GLubyte *) _mesa_map_pbo_source(ctx, unpack, bitmap);
+   if (!bitmap)
+      return;
+
+   swrast_render_start(ctx);
+
+   if (SWRAST_CONTEXT(ctx)->NewState)
+      _swrast_validate_derived( ctx );
+
+   INIT_SPAN(span, GL_BITMAP);
+   span.end = width;
+   span.arrayMask = SPAN_XY;
+   _swrast_span_default_attribs(ctx, &span);
+
+   for (row = 0; row < height; row++) {
+      const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
+                 bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
+
+      if (unpack->LsbFirst) {
+         /* Lsb first */
+         GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
+         for (col = 0; col < width; col++) {
+            if (*src & mask) {
+               span.array->x[count] = px + col;
+               span.array->y[count] = py + row;
+               count++;
+            }
+            if (mask == 128U) {
+               src++;
+               mask = 1U;
+            }
+            else {
+               mask = mask << 1;
+            }
+         }
+
+         /* get ready for next row */
+         if (mask != 1)
+            src++;
+      }
+      else {
+         /* Msb first */
+         GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
+         for (col = 0; col < width; col++) {
+            if (*src & mask) {
+               span.array->x[count] = px + col;
+               span.array->y[count] = py + row;
+               count++;
+            }
+            if (mask == 1U) {
+               src++;
+               mask = 128U;
+            }
+            else {
+               mask = mask >> 1;
+            }
+         }
+
+         /* get ready for next row */
+         if (mask != 128)
+            src++;
+      }
+
+      if (count + width >= MAX_WIDTH || row + 1 == height) {
+         /* flush the span */
+         span.end = count;
+         if (ctx->Visual.rgbMode)
+            _swrast_write_rgba_span(ctx, &span);
+         else
+            _swrast_write_index_span(ctx, &span);
+         span.end = 0;
+         count = 0;
+      }
+   }
+
+   swrast_render_finish(ctx);
+
+   _mesa_unmap_pbo_source(ctx, unpack);
+}
+
+
+#if 0
+/*
+ * XXX this is another way to implement Bitmap.  Use horizontal runs of
+ * fragments, initializing the mask array to indicate which fragments to
+ * draw or skip.
+ */
+void
+_swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
+		GLsizei width, GLsizei height,
+		const struct gl_pixelstore_attrib *unpack,
+		const GLubyte *bitmap )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLint row, col;
+   SWspan span;
+
+   ASSERT(ctx->RenderMode == GL_RENDER);
+   ASSERT(bitmap);
+
+   swrast_render_start(ctx);
+
+   if (SWRAST_CONTEXT(ctx)->NewState)
+      _swrast_validate_derived( ctx );
+
+   INIT_SPAN(span, GL_BITMAP);
+   span.end = width;
+   span.arrayMask = SPAN_MASK;
+   _swrast_span_default_attribs(ctx, &span);
+
+   /*span.arrayMask |= SPAN_MASK;*/  /* we'll init span.mask[] */
+   span.x = px;
+   span.y = py;
+   /*span.end = width;*/
+
+   for (row=0; row<height; row++, span.y++) {
+      const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
+                 bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
+
+      if (unpack->LsbFirst) {
+         /* Lsb first */
+         GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
+         for (col=0; col<width; col++) {
+            span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
+            if (mask == 128U) {
+               src++;
+               mask = 1U;
+            }
+            else {
+               mask = mask << 1;
+            }
+         }
+
+         if (ctx->Visual.rgbMode)
+            _swrast_write_rgba_span(ctx, &span);
+         else
+	    _swrast_write_index_span(ctx, &span);
+
+         /* get ready for next row */
+         if (mask != 1)
+            src++;
+      }
+      else {
+         /* Msb first */
+         GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
+         for (col=0; col<width; col++) {
+            span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
+            if (mask == 1U) {
+               src++;
+               mask = 128U;
+            }
+            else {
+               mask = mask >> 1;
+            }
+         }
+
+         if (ctx->Visual.rgbMode)
+            _swrast_write_rgba_span(ctx, &span);
+         else
+            _swrast_write_index_span(ctx, &span);
+
+         /* get ready for next row */
+         if (mask != 128)
+            src++;
+      }
+   }
+
+   swrast_render_finish(ctx);
+}
+#endif